FRENCH President Emmanuel has said he has PROOF that chemical weapons were used by the Syrian government.
He added he would decide on what action to take once all the information has been verified.
Macron previously vowed to launch military action if France had evidence of chemical weapons being used.
The US and its allies, including the UK, have been considering whether to hit Syria over the suspected poison gas attack that medical relief organisations say killed dozens of people in the rebel-held town of Douma near Damascus on Saturday.
The attack killed at least 60 people and injured more than 1,000 others.
Reports suggested more than 500 people, mostly women and children, were taken to medical centres with difficulty breathing, foaming at the mouth and burning sensations in the eyes.
Speaking to Sky News this morning, the Chair of the International Institute for Strategic Studies Council (IISS) said a strike against Syria's rogue regime will be inevitable after French President Emmanuel Macron announced Syrian President Bashar al-Assad had "crossed his red lines" on the use of chemical weapons.
Mr Heisbourg added a strike would be aimed at Syria's chemical weapons capability and will be conducted with the help of US President Donald Trump.
He said: “The position is very clear, Macron stated some months ago that the use of chemical weapons would be a red line which if crossed would entail a French military response.
“He stated earlier today that the red line had been crossed and therefore the assumption has to be that there will be a French military strike, probably conducted with the United States of America in fairly short order.
Mr Macron's statement comes after a war of words between President Trump and Moscow yesterday - the US President warned Russia "missiles are coming" and the Kremlin responded by vowing to blow up US ships.
An astonishingly volatile tweet from Trump about proposed US intervention in Syria said: "Get ready Russia, because they [missiles] will be coming, nice and new and “smart!”.
The tweet further incensed Russia who had already warned US missiles would be shot down and “launch sites” – believed to be the two American warships on patrol in the Mediterranean – would be blown up.